Results 41 to 50 of about 3,871 (214)

Nature of the Interaction of Pyridines with OCS. A Theoretical Investigation

Molecules, 2020
Ab initio calculations were carried out to investigate the interaction between para-substituted pyridines (X-C5H4N, X=NH2, CH3, H, CN, NO2) and OCS. Three stable structures of pyridine.OCS complexes were detected at the MP2=full/aug-cc-pVDZ level.
Sumitra Bhattarai, Dipankar Sutradhar, Asit K. Chandra, Therese Zeegers-Huyskens   +3 more
doaj   +1 more source

Tetrel, Chalcogen, and Charge-Assisted Hydrogen Bonds in 2-((2-Carboxy-1-(substituted)-2-hydroxyethyl)thio) Pyridin-1-ium Chlorides

Crystals, 2017
Reaction of 2-chloro-2-(diethoxymethyl)-3-substitutedoxirane or 1-chloro-1-(substituted) -3,3-diethoxypropan-2-one with pyridine-2-thiol in EtOH at 25 °C yields 3-(diethoxymethyl)-3-hydroxy-2-substituted-2,3-dihydrothiazolo[3,2-a]pyridin-4-ium chlorides,
Firudin I. Guseinov, Mikhail F. Pistsov, Eldar M. Movsumzade, Leonid M. Kustov, Victor A. Tafeenko, Vladimir V. Chernyshev, Atash V. Gurbanov, Kamran T. Mahmudov, Armando J. L. Pombeiro   +8 more
doaj   +1 more source

Evidence for and evaluation of fluorine–tellurium chalcogen bonding

Chemical Science, 2023
The first in-depth characterization of Te–F chalcogen bonding in solution was achieved by designing and preparing specific Te derivatives followed by their NMR study.
Weiss, Robin, Aubert, Emmanuel, Groslambert, Loic, Pale, Patrick, Mamane, Victor   +4 more
openaire   +2 more sources

Noncovalent Bonds, Spectral and Thermal Properties of Substituted Thiazolo[2,3-b][1,3]thiazinium Triiodides

Crystals, 2019
The interrelation between noncovalent bonds and physicochemical properties is in the spotlight due to the practical aspects in the field of crystalline material design.
Irina Yushina, Natalya Tarasova, Dmitry Kim, Vladimir Sharutin, Ekaterina Bartashevich   +4 more
doaj   +1 more source

σ-Hole Bonds and the VSEPR Model—From the Tetrahedral Structure to the Trigonal Bipyramid

Sci, 2022
Complexes linked by various interactions are analysed in this study. They are characterized by the tetrahedral configuration of the Lewis acid centre.
Sławomir J. Grabowski
doaj   +1 more source

Imidazole-functionalized pyridinium-fused selenadiazolium salts as versatile chalcogen bond donors

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry
Novel imidazole-functionalized pyridinium-fused selenadiazolium salts were synthesised and structurally characterised as versatile chalcogen bond (ChB) donors.
Evghenii Duhnovskii, Namiq Shikhaliyev, Alexander Sapronov, Alexey Kubasov, Alexander Novikov, Alexander Tskhovrebov, Gulnaz Mirzayeva   +6 more
doaj   +1 more source

Chalcogen Bonding Catalysis of a Nitro‐Michael Reaction [PDF]

Angewandte Chemie International Edition, 2019
AbstractChalcogen bonding is the non‐covalent interaction between Lewis acidic chalcogen substituents and Lewis bases. Herein, we present the first application of dicationic tellurium‐based chalcogen bond donors in the nitro‐Michael reaction between trans‐β‐nitrostyrene and indoles.
Patrick Wonner, Alexander Dreger, Lukas Vogel, Elric Engelage, Stefan M. Huber   +4 more
openaire   +3 more sources

I₂-Catalyzed/DMSO System for the Oxidation of Se-Se Bond Activated by the Use of SynLED Parallel Photoreactor^®

Chemistry Proceedings, 2022
Among the different green oxidative protocols, I2-catalyzed/DMSO systems have recently received considerable attention due to being greener, efficient, atom-economical, low-cost, and offering the possibility to perform reactions under safe and mild ...
Gloria Pizzoli, Federica D’Ottavio, Cecilia Scimmi, Claudio Santi   +3 more
doaj   +1 more source

Intra-/Intermolecular Bifurcated Chalcogen Bonding in Crystal Structure of Thiazole/Thiadiazole Derived Binuclear (Diaminocarbene)PdII Complexes

Crystals, 2018
The coupling of cis-[PdCl2(CNXyl)2] (Xyl = 2,6-Me2C6H3) with 4-phenylthiazol-2-amine in molar ratio 2:3 at RT in CH2Cl2 leads to binuclear (diaminocarbene)PdII complex 3c. The complex was characterized by HRESI+-MS, 1H NMR spectroscopy, and its structure
Alexander S. Mikherdov, Alexander S. Novikov, Mikhail A. Kinzhalov, Andrey A. Zolotarev, Vadim P. Boyarskiy   +4 more
doaj   +1 more source

Chalcogen bonding in coordination chemistry

Coordination Chemistry Reviews, 2022
The chalcogen bond (ChB) is defined as a noncovalent interaction between the electron density deficient region (so-called as sigma or pi hole) of a covalently bonded chalcogen atom and a nucleophilic (Nu) site in the same (intramolecular) or another (intermolecular) molecular entity: R-Ch center dot center dot center dot Nu [Ch = O, S, Se or Te; R = C,
Kamran T. Mahmudov, Atash V. Gurbanov, Vusala A. Aliyeva, M. F??tima C. Guedes da Silva, Giuseppe Resnati, Armando J. L. Pombeiro   +5 more
openaire   +2 more sources